Research Article
Study on Reasonable Chain Pillar Size in a Thick Coal Seam
Figure 12
Vertical stress in the different coal pillars width.
| (a) Coal pillar width 46 m |
| (b) Coal pillar width 33 m |
| (c) Coal pillar width 25 m |
| (d) Coal pillar width 15 m |
| (a) Coal pillar width 46 m |
| (b) Coal pillar width 33 m |
| (c) Coal pillar width 25 m |
| (d) Coal pillar width 15 m |